Goodwill and Intangible Assets, Net - Changes In Goodwill (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Mar. 31, 2015
Changes in Goodwill  
Balance as of June 30, 2014 $ 1,230.9
Currency translation adjustments (61.8)
Balance as of March 31, 2015 1,169.1
Automotive Retail North America  
Changes in Goodwill  
Balance as of June 30, 2014 400.1
Currency translation adjustments (3.4)
Balance as of March 31, 2015 396.7
Automotive Retail International  
Changes in Goodwill  
Balance as of June 30, 2014 454.7
Currency translation adjustments (58.4)
Balance as of March 31, 2015 396.3
Digital Marketing  
Changes in Goodwill  
Balance as of June 30, 2014 376.1
Currency translation adjustments 0
Balance as of March 31, 2015 $ 376.1